Abstract
Anti-caking ability of NTA-amide was examined by pressure and absorption-desorption caking tests. And the following results were obtained;
1. NTA-amide was found to have the effect of habit change on the crystallization of sodium chloride. Therefore, it was classified as an anti-caking agent by habit change.
2. Appreciable anti-caking effect of NTA-amide was expected with the addition of 5 ppm. The anti-caking ability was increased till 10 ppm then decreased gradually as the increase of the amount of NTA-amide.
3. NTA-amide decomposed at the temperature above 157°C. The anti-caking ability was not decreased, when the sample salt added with NTA-amide was dried below 140°C.
4. Anti-caking ability of NTA-amide was disturbed to some extent by potassium, magnesium and sulfate ions.
5. Anti-caking ability of NTA-amide was not decreased till 10 cycles of absorption-desorption caking test.
